Cork's playing career began in Maribor, and finally Maribor, Ins and Outs lasted for 20 years, his position is mainly in the back. Retired in 2000 in Maribor, Slovenia began his coaching career, he immediately won the 2000-01 championship season. Under his guidance, in Maribor in 2003 won the league title again. In 2006, he became Slovenia U15 and U16 youth team coach. January 3, 2007, Koch was appointed as the Slovenian national team coach. World Cup qualifier in Slovenia got its second group match, they encountered in the playoff draw a strong Russia. While all are not optimistic about Slovenia, but Koch's team, or by virtue of an away goal advantage, so magical Guus Hiddink tasted the bitter taste of defeat, leading Slovenian team won the 2010 World Cup finals in South Africa qualify.